EP3237730A1 - Ventiltriebvorrichtung für eine brennkraftmaschine - Google Patents
Ventiltriebvorrichtung für eine brennkraftmaschineInfo
- Publication number
- EP3237730A1 EP3237730A1 EP15804071.7A EP15804071A EP3237730A1 EP 3237730 A1 EP3237730 A1 EP 3237730A1 EP 15804071 A EP15804071 A EP 15804071A EP 3237730 A1 EP3237730 A1 EP 3237730A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- engagement element
- switching position
- engagement
- adjusting device
- restoring force
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01L—CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
- F01L1/00—Valve-gear or valve arrangements, e.g. lift-valve gear
- F01L1/02—Valve drive
- F01L1/04—Valve drive by means of cams, camshafts, cam discs, eccentrics or the like
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01L—CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
- F01L1/00—Valve-gear or valve arrangements, e.g. lift-valve gear
- F01L1/02—Valve drive
- F01L1/04—Valve drive by means of cams, camshafts, cam discs, eccentrics or the like
- F01L1/047—Camshafts
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01L—CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
- F01L13/00—Modifications of valve-gear to facilitate reversing, braking, starting, changing compression ratio, or other specific operations
- F01L13/0015—Modifications of valve-gear to facilitate reversing, braking, starting, changing compression ratio, or other specific operations for optimising engine performances by modifying valve lift according to various working parameters, e.g. rotational speed, load, torque
- F01L13/0036—Modifications of valve-gear to facilitate reversing, braking, starting, changing compression ratio, or other specific operations for optimising engine performances by modifying valve lift according to various working parameters, e.g. rotational speed, load, torque the valves being driven by two or more cams with different shape, size or timing or a single cam profiled in axial and radial direction
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01L—CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
- F01L13/00—Modifications of valve-gear to facilitate reversing, braking, starting, changing compression ratio, or other specific operations
- F01L13/06—Modifications of valve-gear to facilitate reversing, braking, starting, changing compression ratio, or other specific operations for braking
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01L—CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
- F01L1/00—Valve-gear or valve arrangements, e.g. lift-valve gear
- F01L1/02—Valve drive
- F01L1/04—Valve drive by means of cams, camshafts, cam discs, eccentrics or the like
- F01L1/047—Camshafts
- F01L2001/0471—Assembled camshafts
- F01L2001/0473—Composite camshafts, e.g. with cams or cam sleeve being able to move relative to the inner camshaft or a cam adjusting rod
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01L—CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
- F01L13/00—Modifications of valve-gear to facilitate reversing, braking, starting, changing compression ratio, or other specific operations
- F01L13/0015—Modifications of valve-gear to facilitate reversing, braking, starting, changing compression ratio, or other specific operations for optimising engine performances by modifying valve lift according to various working parameters, e.g. rotational speed, load, torque
- F01L13/0036—Modifications of valve-gear to facilitate reversing, braking, starting, changing compression ratio, or other specific operations for optimising engine performances by modifying valve lift according to various working parameters, e.g. rotational speed, load, torque the valves being driven by two or more cams with different shape, size or timing or a single cam profiled in axial and radial direction
- F01L2013/0052—Modifications of valve-gear to facilitate reversing, braking, starting, changing compression ratio, or other specific operations for optimising engine performances by modifying valve lift according to various working parameters, e.g. rotational speed, load, torque the valves being driven by two or more cams with different shape, size or timing or a single cam profiled in axial and radial direction with cams provided on an axially slidable sleeve
Definitions
- the invention relates to a valve drive device for an internal combustion engine, an internal combustion engine with an engine brake and a method for operating the valve drive device.
- the valve drive device comprises an axial
- the adjusting device comprises a first engagement element which is provided to axially displace the cam element into a first switching position. Furthermore, the adjusting device comprises a second engagement element which is provided to axially displace the cam element into a second switching position.
- the adjusting device has a first slide track, in which the first engagement element is guided in the first switching position. Furthermore, the adjusting device has a second slide track, in which the second engagement element is guided in the second switching position.
- the first engagement element is forcibly coupled to the second engagement element.
- the invention is in particular the object of a particularly
- the invention is based on a valve drive device for an internal combustion engine, with an axially displaceable cam element and with an adjusting device comprising a first engagement element which is intended to axially displace the cam element into a first switching position and which comprises a second engagement element is provided to the cam member in a second switching position to move axially, wherein the adjusting device has a first slide track, in which the first engagement element is guided in the first switching position, and a second slide track, in which the second engagement element is guided in the second switching position, wherein the first engagement element with the second
- Engagement element is formed positively coupled.
- the adjusting device comprises a triggering device, which is provided to hold the first engaging element in the second switching position against a restoring force.
- Brake motor in particular a truck, is.
- Valve train device is preferably for an internal combustion engine one
- the cam element is preferably rotatably and axially displaceably mounted.
- a "cam element rotatably and axially displaceably mounted” is to be understood in particular as a cam element which is rotatably and axially displaceably mounted relative to a cylinder head or another stationarily arranged component of the internal combustion engine
- Cam member rotatably and is, in particular together with the
- Cam element mounted axially displaceable in the cylinder head.
- the term “axial” is particularly related to a main axis of rotation of the cam member, so that the term “axial” refers in particular to a direction which is parallel or coaxial with the main axis of rotation.
- the term “radial” is particularly related to the main axis of rotation of the cam member, so that the term “radial” refers in particular to a direction which is perpendicular to the main axis of rotation.
- valve lift changeover is to be understood to mean, in particular, a discrete switchover between at least two valve actuation curves which define an actuation of at least one gas exchange valve
- Crom element is to be understood in particular an element which has at least one cam for actuating a gas exchange valve merely providing the first engagement member for axial displacement of the cam member in two opposite directions.
- a "first switching position" is intended in particular to mean a
- a "second switching position" is intended in particular to mean a triggering position and / or a triggering position
- Motor brake position are understood.
- the restoring force is at least substantially constant.
- provided is to be understood in particular to be specially designed, designed, equipped and / or arranged.
- the triggering device comprises an electromagnet, which is provided to hold the first engagement element in the second switching position against the restoring force.
- the triggering device is provided to provide a triggering force, which extends radially starting from the cam element.
- the triggering device comprises a return spring, which is provided for exerting the restoring force on the first engagement element in the direction of the first slide track.
- the return spring forms a helical compression spring.
- the restoring force is aligned radially in the direction of the cam member.
- the return spring is provided to return the first engagement element after a shutdown of the electromagnet in the first slide track for performing a switching operation in the first switching position.
- an operation in case of electrical failure of the electromagnet can advantageously be continued in the first switching position.
- no external energy, such as, in particular, electrical energy is required to carry out the switching operation into the first switching position.
- the first slide track is provided for, upon rotation of the cam member in the first switching position, the first engagement member to oscillate in a radial direction of the cam member to move.
- the first slide track viewed over a circumferential course, different distances to the main axis of rotation of the cam member.
- the first engagement element can advantageously be introduced as a function of a rotation angle of the cam element. This can advantageously be achieved increased reliability.
- the first engagement element is arranged in such a way to the triggering device that the restoring force in a movement portion of the first engagement element is greater than a release force of the triggering device acting on the first engagement element.
- a "release force” is to be understood as meaning, in particular, a holding force and / or a magnetic force, in particular an attractive magnetic force
- a "movement portion” is to be understood as meaning in particular a portion of a maximum possible range of motion.
- the triggering device preferably acts on the first engagement element only in a near zone with a greater release force than the restoring force. Thereby, a switching operation in an unwanted rotational angle position of the cam member can be advantageously avoided.
- a temporal control of the triggering device can advantageously also be carried out imprecisely and / or independently of a rotational angle position of the cam element.
- the adjustment device comprises a lever element which supports the first engagement element and the second engagement element about a common pivot axis.
- the pivot axis is parallel to the main axis of rotation of the cam member.
- Other triggering devices can be advantageously avoided.
- a synchronization between a movement of the first engagement element and a movement of the second engagement element can be achieved particularly reliable and durable.
- valve drive device comprises a camshaft for the rotationally fixed mounting of the cam element, wherein the adjusting device is arranged at a free longitudinal end of the camshaft.
- the valve drive device can be integrated particularly easily into an internal combustion engine.
- a "free longitudinal end” should in particular refer to a free end. be understood in a main extension direction of an element.
- Cam element in two opposite directions from a first switching position proposed in a second switching position, with an adjusting device, wherein a first engaging element is positively coupled to a second engaging element and wherein the first engaging member of a triggering device in the second
- Shift position is held against a restoring force. As a result, a particularly high level of operational reliability can be achieved.
- valvetrain device 1 is an isometric view of a valvetrain device
- Fig. 3 is a side view of the valve drive device in a maximum
- valve drive device 4 shows the valve drive device in a sectional view through IV - IV
- Fig. 5 is another side view of the valve drive device in a minimum
- valve drive device 6 is a sectional view of the valve drive device in one
- Fig. 7 is a further sectional view of the valve drive device in one
- FIG. 8 is another side view of the valve drive device in one
- Fig. 9 is another side view of the valve drive device in a
- Figures 1 and 2 show a valve drive device for an internal combustion engine not shown in detail.
- the internal combustion engine has an engine brake.
- the valve drive device comprises an axially displaceable cam element 10.
- the valve drive device has a camshaft 22.
- the camshaft 22 is provided for the rotationally fixed mounting of the cam member 10. That's it
- Cam member 10 rotatably connected to the camshaft 22.
- the cam 10 is rotatably mounted about a main axis of rotation 23.
- the camshaft 22 is rotatably supported about the main rotation axis 23.
- the camshaft 22 has two differently configured, not shown in detail cam.
- the different cams have a same base circle radius.
- the different cams are each provided for different operating modes, such as in particular for a firing mode and for an engine braking mode.
- the valve drive device has an adjusting device 11.
- the adjusting device 11 is a adjusting device 11.
- the first engagement element 12 is provided for axially displacing the cam element 10 into a first shift position.
- the first engagement element 12 is cylindrical.
- the adjusting device 11 has a first slide track 14.
- Sliding track 14 has different segments.
- a segment forms a first engagement segment 27.
- Another segment forms a first adjustment segment 28.
- the first Einspursegment 27 extends in the circumferential direction and has three circumferentially offset by 120 ° elevations.
- the first slide track 14 thus has, viewed over a circumferential course, different distances to
- Cam member 10 is an oscillating movement. A maximum
- Oscillation angle reaches the first engagement element 12 on one of the elevations.
- a minimum oscillation angle reaches the first engagement element 12 at a middle between two elevations.
- the first slide track 14 is provided, upon rotation of the cam member 10 in the first switching position, the first Engagement member 12 oscillating in a radial direction 19 of the cam member 10 to move.
- the first adjustment segment 28 has a direction with a radial and an axial component. Due to the axial component, the cam member 10 can be moved axially. A radial depth of the first adjustment segment 28 corresponds to a radial depth of the first engagement segment 27. A radial height of a first
- the adjusting device 11 comprises a second engagement element 13.
- the second engagement element 13 is provided for axially displacing the cam element 10 into a second switching position.
- the adjusting device 11 is arranged at a free longitudinal end 26 of the camshaft 22.
- the second engagement element 13 is cylindrical.
- the adjusting device 11 has a second slide track 15.
- the second slide track 15 is axially spaced from the first slide track 14.
- the second slide track 15 has different segments.
- One segment forms a second single track segment 30.
- the second Einspursegment 30 extends in the circumferential direction and has a circumferentially constant distance to the main axis of rotation 23.
- the second Einspursegment 30 includes a second adjustment segment 31.
- the second adjustment segment 31 has a direction with a radial and an axial component. Due to the axial component, the cam member 10 can be moved axially.
- the second adjustment segment 31 is further spaced from the main rotation axis 23 than the second engagement segment 30.
- a step is formed over an entire circumference.
- a height of a second guide wall 32 of the second adjustment segment 31 decreases in the circumferential direction.
- the second adjustment segment 31 is provided to guide the second engagement element 13 along the second guide wall 32 into the engagement segment 30 when the second shift position is activated.
- the cam member 10 is thereby displaced axially.
- the second guide wall 32 includes an acute angle to a main rotation plane of the cam member 10.
- the main rotation plane is perpendicular to the main axis of rotation 23.
- the first engagement element 12 is guided in the first shift position in the first slide track 14.
- the valve drive device is in a firing mode.
- the first engagement element 12 is moved up and down on the first slide track 14 in a radial direction.
- FIG. 3 shows the first one
- Engagement element 12 with a maximum oscillation angle.
- the first engagement element 12 of the main axis of rotation 23 is closest.
- the first engagement element 12 is located between two elevations of the first engagement segment 27.
- One of the elevations pushes the first engagement element 12 away from the main rotation axis 23 during further rotation of the cam element 10.
- FIG. 5 shows the first engagement element 12 a minimum oscillation angle.
- the first engagement element 12 is furthest from the main axis of rotation 23.
- the first engagement element 12 lies on one of the elevations of the first Einspursegments 27th
- the second engagement element 13 is spaced apart from the second slide track 15 during the firing mode.
- the first engagement element 12 is positively coupled to the second engagement element 13.
- the adjusting device 11 comprises a lever element 33.
- the lever element 33 supports the first engagement element 12 and the second engagement element 13 about a common pivot axis 21.
- the common pivot axis 21 extends parallel to the main axis of rotation 23 of the cam element 10.
- the triggering device 16 comprises a return spring 18.
- the return spring 18 loads the first engagement element 12 with a restoring force.
- the return spring 18 is provided for exerting the restoring force on the first engagement element 12 in the direction of the first slide track 14.
- the return spring 18 forms a helical compression spring.
- the restoring force is aligned radially in the direction of the cam element 10.
- the adjusting device 11 comprises a triggering device 16.
- the triggering device 16 is provided for changing the operating mode. More specifically, the tripping device 16 is provided for activating an engine braking mode. For this purpose, the triggering device 16 holds the first engagement element 12 against the restoring force (FIG. 6).
- the triggering device 16 comprises an electromagnet 17.
- the electromagnet 17 is provided to hold the first engagement element 12 in the second switching position against the restoring force.
- the electromagnet 17 is electrically actuated via a cable 34.
- the triggering device 16 is provided to provide a triggering force that extends radially from the cam element 10. The release force corresponds to a magnetic holding force in this embodiment.
- the electromagnet 17 is arranged radially behind the first engagement element 12 starting from the main rotational axis 23.
- the electromagnet 17 attracts the first engagement element 12 in an activated state.
- the electromagnet 17 comprises a magnet coil 24.
- the electromagnet 17 further comprises a magnet housing 25 in which the magnet coil 24 is arranged.
- the return spring 18 is disposed within the magnet housing 25.
- the return spring 18 is surrounded by the magnetic coil 24.
- the return spring 18 is arranged coaxially with the magnet coil 24.
- the first engagement element 12 is arranged in such a way to the triggering device 16, that the restoring force in a moving portion 20 of the first engaging member 12 is greater than acting on the first engaging member 12 release force of the triggering device 16.
- a distance between the electromagnet 17 and a magnetic force of the electromagnet 17th are designed by a specialist so that the release force exceeds the restoring force only in the range of the minimum oscillation angle.
- the triggering device 16 does not trigger, since the magnetic force acting on the engagement element 12 is less than the restoring force of the return spring 18. With a decreasing oscillation angle and the associated approach of the first engagement element 12 the electromagnet 17 increases the effect of the magnetic force on the first engaging element 12 and finally exceeds the restoring force in a near area. Then, the first engagement element 12 is used to the electromagnet 17.
- the second engagement member 13 is applied to the second slide track 15.
- the cam member 10 is displaced axially by abutment of the second engagement member 13 on the second guide wall 32 and then moves into the second Einspursegment 30. Thereby, the cam member 10 is axially locked ( Figure 7).
- the second switching position is now taken.
- the first engagement element 13 is in the second switching position on the electromagnet 17.
- the electromagnet 17 is turned off.
- the return spring 18 is provided to return the first engagement element 12 after the switching off of the electromagnet 17 in the first slide track 14 for performing the switching operation in the first switching position. In case of failure of the electromagnet 17 also carried out the implementation of the switching operation in the first switching position.
- the return spring 18 presses the first engagement element 12 after the switching off of the electromagnet 17 on the first slide track 14.
- the first engagement element 12 is located at the axial height of the first
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Valve Device For Special Equipments (AREA)
- Valve-Gear Or Valve Arrangements (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102014019573.2A DE102014019573A1 (de) | 2014-12-23 | 2014-12-23 | Ventiltriebvorrichtung für eine Brennkraftmaschine |
PCT/EP2015/002421 WO2016102042A1 (de) | 2014-12-23 | 2015-12-02 | Ventiltriebvorrichtung für eine brennkraftmaschine |
Publications (2)
Publication Number | Publication Date |
---|---|
EP3237730A1 true EP3237730A1 (de) | 2017-11-01 |
EP3237730B1 EP3237730B1 (de) | 2018-09-26 |
Family
ID=54771069
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP15804071.7A Not-in-force EP3237730B1 (de) | 2014-12-23 | 2015-12-02 | Ventiltriebvorrichtung für eine brennkraftmaschine |
Country Status (6)
Country | Link |
---|---|
US (1) | US10443454B2 (de) |
EP (1) | EP3237730B1 (de) |
JP (1) | JP6357590B2 (de) |
CN (1) | CN107109966B (de) |
DE (1) | DE102014019573A1 (de) |
WO (1) | WO2016102042A1 (de) |
Families Citing this family (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102017004817A1 (de) * | 2017-05-18 | 2018-11-22 | Man Truck & Bus Ag | Verfahren und Vorrichtung zum Starten eines Verbrennungsmotors |
DE102017117402A1 (de) | 2017-08-01 | 2019-02-07 | Eto Magnetic Gmbh | Vorrichtung und Verfahren zum Aktivieren eines Motorbremsbetriebs eines Verbrennungsmotors |
DE102017009350A1 (de) | 2017-10-09 | 2018-04-19 | Daimler Ag | Ventiltriebvorrichtung, insbesondere für eine Brennkraftmaschine |
DE102018110705A1 (de) | 2018-05-04 | 2019-11-07 | Man Truck & Bus Se | Variabler Ventiltrieb |
DE102018110714A1 (de) * | 2018-05-04 | 2019-11-07 | Man Truck & Bus Se | Variabler Ventiltrieb |
AT521446B1 (de) | 2018-06-21 | 2021-12-15 | Avl List Gmbh | Ventiltriebvorrichtung für eine brennkraftmaschine |
Family Cites Families (13)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
AT408127B (de) * | 1992-07-13 | 2001-09-25 | Avl Verbrennungskraft Messtech | Brennkraftmaschine mit mindestens einer durch eine verstellvorrichtung axial verschiebbaren nockenwelle |
DE10351223B4 (de) | 2003-10-28 | 2010-02-18 | Hydraulik-Ring Gmbh | Nockenwellenverstelleinrichtung für Fahrzeuge, vorzugsweise für Kraftfahrzeuge |
DE102007048915A1 (de) | 2007-10-12 | 2009-04-16 | Daimler Ag | Ventiltriebvorrichtungen |
DE102008029325A1 (de) | 2008-06-20 | 2009-12-24 | Daimler Ag | Ventiltriebvorrichtung |
JP5117475B2 (ja) * | 2009-03-23 | 2013-01-16 | 株式会社オティックス | 可変動弁機構 |
DE102011076276A1 (de) | 2011-05-23 | 2012-11-29 | Schaeffler Technologies AG & Co. KG | Dichtungsring mit poröser Membran |
DE102011076726A1 (de) * | 2011-05-30 | 2012-12-06 | Schaeffler Technologies AG & Co. KG | Ventiltrieb eines Verbrennungskolbenmotors |
JP5793070B2 (ja) | 2011-12-27 | 2015-10-14 | 株式会社オティックス | 可変動弁機構 |
JP5873331B2 (ja) | 2011-12-29 | 2016-03-01 | 株式会社オティックス | 可変動弁機構 |
DE102012003491A1 (de) | 2012-02-21 | 2013-08-22 | Daimler Ag | Kraftfahrzeugventiltriebverstellvorrichtung |
JP6035965B2 (ja) | 2012-08-02 | 2016-11-30 | 株式会社デンソー | 電磁アクチュエータ |
JP6059080B2 (ja) | 2013-05-16 | 2017-01-11 | 株式会社オティックス | 内燃機関の可変動弁機構 |
GB2545257A (en) * | 2015-12-10 | 2017-06-14 | Gm Global Tech Operations Llc | Internal combustion engine comprising a shifting cam system for variable valve actuation |
-
2014
- 2014-12-23 DE DE102014019573.2A patent/DE102014019573A1/de not_active Withdrawn
-
2015
- 2015-12-02 CN CN201580070164.4A patent/CN107109966B/zh not_active Expired - Fee Related
- 2015-12-02 WO PCT/EP2015/002421 patent/WO2016102042A1/de active Application Filing
- 2015-12-02 EP EP15804071.7A patent/EP3237730B1/de not_active Not-in-force
- 2015-12-02 JP JP2017531880A patent/JP6357590B2/ja not_active Expired - Fee Related
- 2015-12-02 US US15/539,053 patent/US10443454B2/en not_active Expired - Fee Related
Also Published As
Publication number | Publication date |
---|---|
EP3237730B1 (de) | 2018-09-26 |
DE102014019573A1 (de) | 2016-06-23 |
JP6357590B2 (ja) | 2018-07-11 |
US10443454B2 (en) | 2019-10-15 |
CN107109966A (zh) | 2017-08-29 |
US20170362964A1 (en) | 2017-12-21 |
CN107109966B (zh) | 2019-07-05 |
JP2017538067A (ja) | 2017-12-21 |
WO2016102042A1 (de) | 2016-06-30 |
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